Spark-coil.



C. H.,THORDARSON.

SPARK COIL. APPLICATION FILED SEPT. 3, 1907.

958,899. Papamay 24,1910,

l limoen/ko:

'UNITED srA'rEs rATENroFmoE,

CHESTER H'rHoRDAnsoN, or CHICAGO, Immers.'

' 'sPAnxfcoIn spacationonsetm ram. Patented. May 24, 191e.V

Be it known that I, CHnsr'nR H. Tirol-man1 soN, a citizen of the -United States, residing at Chica o, in the county of Cook, AState of;

therefore, .of least self induction, capable of storing up considerable energy and dissi. pating the same in the spark whereby` comparatively little power is lost.

Ot-her objects of the invention. fill appear more fully hereinafter.

The invention consist-s substantially in the construction, combination, location and relathe arrows. Fig. 4,

tive arrangement -of parts all as will more fully appear hereinafter, as shown in the accompanying drawing and finally pointed o ut in the appended'claims.

'Referring to the accompanying diawin and to the various views and reference signsl appearing thereon, Figure `1, is a `view side elevation'of an ignition or spark/coih embodying the principles of my invention. Fig. 2, is view partly in to'ppl/anand. partly in section on the line -g/Q, Fig. 1 looking in the direct-ion of he arrows. Fig. 3 is a view in 'tran'sveiseection on-tlie line 3, 3,.Fig. 2 looking. in'the direction ofA view in transverse section showing a ni iiied construct-ionof core embraced wigrfn the spirit and' scope of my invention/ The same pat is designated bythe same reference sign wherever it. occurs throughout'the several views.

`lherr'aelosed iron ring of uniformtrans-f versel sectional area and material is magnetized in such away that the magnetic flux is parallel with the rin such a ring, does not demagnetize when t e current is bioken even when made of soft iron. lSuch a ring can be partially demagnetizd withhamnier blows and completely demagnetized by cnr,-- ient flowing in reversedirection-around it.. Such a ring therefore 'is' not theinosteconomical o r etiicientor'desirable for'use in connection with ignition, spark or impedance-coils for the reason that the stored up energy in lthe magnetic circuit' thereof isv not dissipated in the spailgg and hence considin the iron of the ring. -If,.liowever, anair space or 'gap 1s provided' transversely demagnetize -when the magnetizing circuit ring or th'esub-division of tliebody thereof or impedance coils employing a. magnet-ic tions andhaving airgaps or spaces formed transversely therethrough :itconvenient ciency, 'that is, the spark produced from such coil ls-lon'ger and hotter with less consumpwhen the electric 'circuit through the coil is broken theflux of the magnetic circuit which is stored vu in such circ'uit,'releases or closes ontlie coll andhclice augments the 'stared up in the magnet-ic 'circuit which- ,e'nergy is transformed in to the spark, i 1 It'is, among'thel special purposes of my present invention to provide an ignition, spark or impedance coil embodying these cliaracteristics'and features.

A The'principles above. referred to and outdiiferent constructions. While, therefore, I

-bodying thev principles of my invention, I Adesire it'tobe understood that said principlesv might well be embodied in A other specific forms of construction and still fall within the spirit and scope of my invention. In the particular foim shown, A, is a coil -wliich may be o f the usual'or any well known construction and arrangement for use in apparatus ofthis character. B, is the core .around which said coil is wound. In practice, though in this respect my invention is not to be limited or. restricted, I prefer to employ-,a` subdivided core. have shown the core made up ofplates or laminatioi'is. In Fig.` 4,- liowever, I have shown -the core, B', made' np of wire rods or sections. The particular character of subdivisions ofthe core is therefore immaterial erable magnetic power is'lost, being retainedthroughthe .body of thering, such ring will is broken, the speed of demagnetizat-ion depending on the quality'o'f the'iron in' the` circuit so sub-divided into' wires or lamination of battery powerfor thereason that? spa/rk produced.' Inother words, 'energy is linedmay be embodied in 'many specifically intowires or laminationsf Ignition, 'spark points, attain the highest degree -of 'etiihave shown specific forms of apparatus 'emin rig. 3, i E? "20.atE.

' Ingpractice and preferably the portions 0,..

155 An ignition, impedance or Sparkle-oil einf in the broadest scope of my invention. Thelaminated form referable on account of cheapness of manu acture. 1

The inagnetic'circuit ofpthe coil is coin- 5- pleted throu h the side pieces, C. These side piecesexten en diametrically opposite sides andin parallel relation with respect to the axis ofthe coil and'each'side piece is providedat its-ends with an inwardly turned portion, -D, -'the inner!faces-'thereofl being- -arranged to bear Aagainst the core orB atoppesite ends of the coil.

vIn practice, and in orderfto eifect in the v most advantageous-way the objectsand pu'r- -'poses of my invention, I prefer to inter# pose insulating .material in the air ga or space between tliecontacting -end sur aces or faces ofthe portions D, and the juxta' posed surfaces ofthe core B, B', as indicated are sub-divided, .thoughin this respect my invention is noti-to be limited or `restricted and in the form shown the subdivisions are in the form'of laminations or plates.

`The side parts, C, may be held inassem-` j --bled relation with respect to the core of the coil ini-any siiitablefor convenient manner.

I have .shown a simple and eflicient way for v'3 0 accomplishing this result. Spring channel plates F, are slipped over each end of the coiLcore and the adjacentends of the s'ide .parts C, as clearly `shown in the drawing..

i The' .provision of the air gaps or spaces parts C, and the core '135- betweenthe contactin surfaces of the side i B", affordedby the interposing therebetween *ofv the insulating'- strips E, enables the magnetic flux of the magnetic circuit to releaseor close'on the; `4o Acoil whenthe 'electric vcircuit -isabrokem whereby the magnetic energy stored up i in -the metal of the magnetic circuit or theside coil is brokenfgis transformed into `heat to augment the* spark-produced lsh'e break .and which storedfi'ipenergy i ated i-n the splarkl therebyl makingth'espar 'longerand otter and the effi-I ciency fof the 'coil withoutincreasing thecon- 5o 'sum tion of *battery* oweitjIn'other words by t e construction ain enabledto avoid the loss due to a .failure in utilizing the -magnetic .flux -of'tlieeinzignetic circuit jat;

the' instant the spark is formed. 1' e f bodying' the rinciplesof construction above set forth is dp any situation where suchcoils are desired.'

I do not desire, therefore, to be limited or'restricted in respect to the .uses to which my invention is to be put and in employing the term s ark coil to designate my invention I inten to include the use of the device for f an purpose for which it is adapted. Itl

wi l also be seen that I enabled to attain esigned and intended for' use in A the maximum eliciencywith a of least resistance and fewest-turns. I

Having now set forth the object and na-4 V ture of my invention and; constructions embodyingthe principles thereof,`wliatj-I claim' 7o as new and useful and of'my ow'n invention,

' I 'desire to'secure b Letters Patent,

'l. A'spark coil aving alaminated core', in combination with independent side pieces. arranged to'bear against the'core at the ends -75 thereof, and. channel clips engaging the ends of the core andi side 'pieces toretain the same inl assembled relation.

sparkco'il havinga ooreand a. subdivided side'part formed with'plejfaces 80'.

presented toward: .but"separated from the ends-of the said core and channel plates'fen'- f" gaging theends of said core andside part .l l -t o hold'thes'g'iineinl assembled relation. 1,; s 3.1;' A spark coil'having a cor,. in combinar 85 tion. with independent side pieces havin-gu "pole-:faces arranged to beanagainst the sides j engaging theends of the pr'e'al'id side pieces I to retain the sainein' assembled'relationsV .fen 4'. A spark .Cil liavin'gQalamnated core,

in combination with independent side pieces ..A

having pole acesai'ranged to bear against the sides vofthe core at the ends thereof, and

means .for engaging'tlie ends ofthe core' and 95 Sdepieces to retain the saine in assembled relation..

' 5. spark coil havinga'coe,'inkiombina f tionwith independent laminatedside'pieces 1 Vhaving pole faces arranged to bearagainst -the'sides of the-core at theends thereof, and' means engaging the endsjf 'the' core" and.,` l

side pieces to 'retain'tlie assembled- -in cembination with iiid'eeiident;laminatedi' A jside piece s'having pole faces arranged to, Vbeara ains't the sides of'thecore at the ends -l the'ijeo and means engaging the ends ofthe-fcore and side piecesto retainf'th'e same' 11o sembled relatiom'- t 7. A s ark coil liavinga-core, .in Vcombi nation with independent side pieceshaving. pole faces arran ed. to bear against 'the sidesofthe'core at t e endsthereof,`insulating 1'415 material interposed between the bearing surfaces of the coreand side pieces, and means 'engaging the ends of thefcore'andside pieces tio-retain the same in assembled relation.v

core and side pieces to retain the same in assembled relation.

havin pole faces-arran d tobear against the si es of thel core att e ends thereof, insulatingA 'material interposed between the .-iontactmg Vsurfaces -of the core and side iecs', and means engaging the ends of the 10. A spark coil having a laminated core in combination with inde endent laminated side pieces having ole aces arranged to bear against the -si es of the core at the ends thereof, insulating material interposed between the' contacting surfaces of the core and side pieces, and means engagingv the ends of the core and side same 'in assembled relation.

11. A spark coil havin a core,-i'n combination with an indepen ent side piece arranged in parallel vrelation with respect to the core and having pole faces at its ends directed toward and bearin a ainst the side of the core at the ends 0 t e latter, and means enga 'ng the ends of the core and side pieces or retaining the same in assembled relatioiiij y '19.` A spark coilhaving a. core, in combi# nation with independent side pieces arranged on opposite sides of the core and in parallel relation with respect thereto, the ends ofthe side pi'eeesforming ole faces and being directed toward an bearin against the sides'o'fgthe core at the ends o the latter, and means engaging the ends of pieces -to retain the2l i Side pieces, arranged 0n opposite sides ofthe VAlu the core and side pieces for retaining the faces and" directed toward .and them-ing against the side of the core at the 'ends 0 the latter; an insulating 4stri 'interposed between the bearing surfaces o the core and side pieces, and means engagingV the ends of the core and side pieces to retain thesaie in assembled relation. 14. A spark coil having a laminated co in combination with independent laminat core andl in parallel relation thereto, said side pieces having their ends forming pole faces .and directed toward and bearingagainst the sides of the core adjacent theends of the latter, insulating stripsinterposed between the bearing surfaces of the core and side pieces, and means engaging the ends of thecore and side pieces to retain the saine in assembled relation.

In testimony whereof I havehereunto m hand lin the presence of the subscribing witnesses,- on this 27th day of July A. D.,

JOHN A. BENijAN. 

